US 2016/0366554 A1 · MULTI-PATH MITIGATION IN RANGEFINDING AND TRACKING OBJECTS USING REDUCED ATTENUATION RF TECHNOLOGY

Abstract

Methods for determining a LOB of one or more user equipment (UE) in a wireless system employing Time Difference of Arrival (TDOA) is described. TDOA techniques are based on estimating the difference in the arrival times of reference signals from multiple receivers or from multiple emitters to a receiver. A particular value of the time difference estimate defines a hyperbola between the two receivers on which the handset may exist. When the distance between the receiving antennas is small relative to the distance of the emitter source (the handset) being located, then the TDOA is equivalent to the angle between the baseline of the sensors (receivers antennas) and the incident RF energy from the emitter. If the angle between the baseline and true North is known, then the line of bearing (LOB) and/or angle of arrival (AoA), can be utilized to determine the location of the UE.

Claims31

Dependent claims

A method for determining a location of one or more user equipment (UE) in a wireless system, the method comprising:

determining specific reference signals communicated within the wireless system and network parameters for the wireless system and the one or more UE;
and
utilizing the specific reference signals and network parameters to calculate a location of at least one UE among the one or more UE.

Dependencies are inferred from the claim text.

Facts

Application

14/105,098Filed 12 Dec 2013

Priority

15 Dec 2005

Published

15 Dec 2016

Term ends

Not estimatedThe source records don’t support an estimate.

Classification14 codes

H04W 4/023
Services making use of location information: using mutual or relative location information between multiple location based services [LBS] targets…
G01S 3/46
Systems for determining direction or deviation from predetermined direction: using antennas spaced apart and measuring phase or time difference…
G01S 5/0218
Details: multipath in signal reception
G01S 5/0226
Details: transmitters

Family

Application60/597,649Us provisional application · filed 15 Dec 2005

Application11/610,595Continuation in part · filed 14 Dec 2006

Application61/103,270Us provisional application · filed 7 Oct 2008

Application12/502,809Continuation in part · filed 14 Jul 2009

Application13/008,519Continuation · filed 18 Jan 2011

Application13/109,904Continuation in part · filed 17 May 2011

Application61/514,839Us provisional application · filed 3 Aug 2011

Application61/554,945Us provisional application · filed 2 Nov 2011

Application61/618,472Us provisional application · filed 30 Mar 2012

Application61/662,270Us provisional application · filed 20 Jun 2012

Application13/566,993Continuation in part · filed 3 Aug 2012